Features?100 Meter Wireless Door Bell?32 Melodies to choose from. Can be changed from a touch of a button?Easy to install?Waterproof remote button light up when pressed?Remote button has double sided adhesive on the back of it?Built in double speakers， makes the bell sound more clear?Ideal for house， office etc?Retail packedInstructionsPress the small gap on the underside of the remote control with a flat screwdriver.Open the remote and insert the 12V battery (small battery， included).Close the remote again and then stick it where you want with the adhesive back.Insert the 2 * AA batteries (not included) into the receiver.Use the button on the side of the receiver to change the melody to your favourite.